Hi, Good Evening. I'm Struggling For Some Third Day With

Hi, good evening. I'm struggling for some third day with bleeding gums, accompanied with sore throat and blood in my nose. I can feel blood in my mouth and when I spit, I spit with tiny blood particles as well. Plus it hurts. The problem is it simply can't be gingivitis - I was at the dentist just 2 weeks ago, he found no trouble at all with my dental habbits and I go to dentist every 6 months. Any ideas?